The Giants placed Sanmartin on the 15-day injured list Saturday, retroactive to Sept. 17, with a right oblique strain, Justice delos Santos of The San Jose Mercury News reports.
Sanmartin pitched well during his latest stint in the majors, posting a 1.54 ERA and 0.94 WHIP over 11.2 innings spanning 14 appearances after his Aug. 20 recall. Unfortunately for the lefty, this injury will end his 2026 season. Sam Hentges (forearm) replaces Sanmartin on the roster and in the San Francisco bullpen.